Siebel Object Interfaces Reference > Interfaces Reference > Business Component Events >
The PreAssociate event is called before a record is added to a business component to create an association. The semantics are the same as for BusComp_PreNewRecord.
ContinueOperation or CancelOperation
CancelOperation stops the execution of the underlying Siebel code associated with the event. However, if there is code in the same script following CancelOperation, that code runs regardless of the CancelOperation.